Science 7 - First Term Examination Review

A set of vocabulary flashcards covering key concepts for the Science 7 First Term Examination, including states of matter, scientific investigation steps, acids and bases, microscope parts, and cell biology.

Melting

The process where a solid changes to a liquid as particles gain energy and move freely.

Freezing

The process where a liquid changes to a solid as particles lose energy and become organized.

Evaporation

The process where a liquid changes to a gas as particles gain energy and spread apart.

Condensation

The process where a gas changes to a liquid as particles lose energy and move closer.

Sublimation/Deposition

Direct changes between the solid and gas states.

Aim/Problem

The part of a scientific investigation that defines what you want to find out.

Materials & Equipment

The tools and substances needed to conduct a scientific investigation.

Procedure/Method

The sequence of steps to follow during an investigation.

Results & Data

Observations, measurements, and tables recorded during a scientific investigation.

Conclusion

The final part of an investigation where the meaning of the results is determined based on evidence.

Acid

A substance that turns blue litmus paper red, such as vinegar or lemon juice.

Base

A substance that turns red litmus paper blue, such as soap solution or ammonia.

Salt

A substance formed during neutralization, with baking soda being a primary example.

Eyepiece

The part of the microscope that the user looks through.

Stage clips

Components of a microscope used to hold the slide in place.

Diaphragm

The microscope part that controls the amount of light passing through.

Fine adjustment knob

The knob on a microscope used to sharpen the image.

Coarse adjustment knob

The knob used for rough focusing of the specimen.

Nucleus

The cell structure that controls activities and contains DNA.

Cell membrane

A structure present in both plant and animal cells that controls the entry and exit of substances.

Mitochondria

The organelle responsible for energy release within a cell.

Cell wall

A structure found in plant cells only, which provides support and is absent in animal cells.

Chloroplasts

Organelles found only in plant cells that are responsible for photosynthesis.

Large central vacuole

A characteristic feature of plant cells used for storage, whereas animal cells have smaller vacuoles.